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The economic operation of any plant
depends critically on the condition of the major plant equipment
which is known to deteriorate. The timing of maintenance and
cleaning have a big impact on profitability. Raw plant data or
manual calculations do not provide enough information on which to base such
important decisions on.
In the past performance has been
monitored by a variety of methods. Condition-based monitoring, oil
analysis and visual inspections are all commonly used. However, the
monitoring of the actual performance of the equipment is less
frequent and is often based on one-off manual calculations or using
snapshot values in a 'homemade' spreadsheet.
No account is
generally taken of instrument drift or errors, bad data or the
accuracy of the data used in the calculations. There is rarely any
reference back to how the performance differs from what it should be
at design. Where there is design reference, often no account is
taken of the ambient conditions.
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